/*
 * Copyright (c) 2007-2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: MutableAttrListImpl.java,v 1.2.4.1 2005/09/15 08:15:47 suresh_emailid Exp $
 */
package com.sun.org.apache.xml.internal.utils;

import java.io.Serializable;

import org.xml.sax.Attributes;
import org.xml.sax.helpers.AttributesImpl;

/**
 * Mutable version of AttributesImpl.
 * @xsl.usage advanced
 */
public class MutableAttrListImpl extends AttributesImpl implements Serializable {
    static final long serialVersionUID = 6289452013442934470L;

    /**
     * Construct a new, empty AttributesImpl object.
     */

    public MutableAttrListImpl() {
        super();
    }

    /**
     * Copy an existing Attributes object.
     *
     * <p>This constructor is especially useful inside a start
     * element event.</p>
     *
     * @param atts The existing Attributes object.
     */
    public MutableAttrListImpl(Attributes atts) {
        super(atts);
    }

    /**
     * Add an attribute to the end of the list.
     *
     * <p>For the sake of speed, this method does no checking
     * to see if the attribute is already in the list: that is
     * the responsibility of the application.</p>
     *
     * @param uri The Namespace URI, or the empty string if
     *        none is available or Namespace processing is not
     *        being performed.
     * @param localName The local name, or the empty string if
     *        Namespace processing is not being performed.
     * @param qName The qualified (prefixed) name, or the empty string
     *        if qualified names are not available.
     * @param type The attribute type as a string.
     * @param value The attribute value.
     */
    public void addAttribute(String uri, String localName, String qName, String type, String value) {

        if (null == uri)
            uri = "";

        // getIndex(qName) seems to be more reliable than getIndex(uri, localName),
        // in the case of the xmlns attribute anyway.
        int index = this.getIndex(qName);
        // int index = this.getIndex(uri, localName);

        // System.out.println("MutableAttrListImpl#addAttribute: "+uri+":"+localName+", "+index+", "+qName+", "+this);

        if (index >= 0)
            this.setAttribute(index, uri, localName, qName, type, value);
        else
            super.addAttribute(uri, localName, qName, type, value);
    }

    /**
     * Add the contents of the attribute list to this list.
     *
     * @param atts List of attributes to add to this list
     */
    public void addAttributes(Attributes atts) {

        int nAtts = atts.getLength();

        for (int i = 0; i < nAtts; i++) {
            String uri = atts.getURI(i);

            if (null == uri)
                uri = "";

            String localName = atts.getLocalName(i);
            String qname = atts.getQName(i);
            int index = this.getIndex(uri, localName);
            // System.out.println("MutableAttrListImpl#addAttributes: "+uri+":"+localName+", "+index+", "+atts.getQName(i)+", "+this);
            if (index >= 0)
                this.setAttribute(index, uri, localName, qname, atts.getType(i), atts.getValue(i));
            else
                addAttribute(uri, localName, qname, atts.getType(i), atts.getValue(i));
        }
    }

    /**
     * Return true if list contains the given (raw) attribute name.
     *
     * @param name Raw name of attribute to look for
     *
     * @return true if an attribute is found with this name
     */
    public boolean contains(String name) {
        return getValue(name) != null;
    }
}

// end of MutableAttrListImpl.java
